化工学报 ›› 2020, Vol. 71 ›› Issue (12): 5589-5598.DOI: 10.11949/0438-1157.20200493

• 催化、动力学与反应器 • 上一篇    下一篇

盐助溶液燃烧法制备MnFe2O4催化过一硫酸盐降解双酚A

岳敏1,2(),王璟1,韩玉泽1,张萍3   

  1. 1.山东省水环境污染控制与资源化重点实验室,山东大学环境科学与工程学院,山东 青岛 266237
    2.《山东大学学报(哲社版)》编辑部,山东 济南 250100
    3.山东城市建设职业学院,山东 济南 250103
  • 收稿日期:2020-05-06 修回日期:2020-08-30 出版日期:2020-12-05 发布日期:2020-12-05
  • 通讯作者: 岳敏
  • 作者简介:岳敏(1976—),女,博士,副教授,sduyue@sdu.edu.cn

Degradation of bisphenol A by peroxymonosulfate activated by MnFe2O4 prepared by salt-assisted solution combustion synthesis

YUE Min1,2(),WANG Jing1,HAN Yuze1,ZHANG Ping3   

  1. 1.Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, Shandong, China
    2.Editorial Department of Journal of Shandong University(Philosophy and Social Sciences), Jinan 250100, Shandong, China
    3.Shandong Urban Construction Vocational College, Jinan 250103, Shandong, China
  • Received:2020-05-06 Revised:2020-08-30 Online:2020-12-05 Published:2020-12-05
  • Contact: YUE Min

摘要:

采用盐助溶液燃烧法制备磁性铁酸锰(MnFe2O4),催化过一硫酸氢盐(PMS)氧化降解水溶液中的双酚A。通过XRD、BET等手段对制备的铁酸锰催化剂进行了表征。探究了MnFe2O4投加量、PMS投加量、溶液初始pH、淬灭剂、共存离子等因素对双酚A降解效果的影响,评估了MnFe2O4催化剂的循环利用性能。结果表明,MnFe2O4和PMS的最合理投加量分别为 0.3 g/L、0.3 mmol/L,初始pH为11.0时双酚A降解效果最好,60 min内的降解率可达99.3%。淬灭实验表明,催化体系中同时存在多种活性物质,1O2是主要活性物种。溶液中Cl-、HCO3-和HPO42-等共存离子的存在影响双酚A的降解。双酚A在60 min内的TOC去除率为34.9%,苯环断裂和开环反应是其主要降解路径。MnFe2O4催化剂循环使用三次后,双酚A的降解率仍保持在90.0%左右。

关键词: 双酚A, MnFe2O4, 盐助溶液燃烧法, 硫酸根自由基, 催化, 降解, 制备

Abstract:

Magnetic manganese ferrite (MnFe2O4) prepared by the salt-assisted solution combustion synthesis was used to activate peroxymonosulfate(PMS) to oxidize bisphenol A in aqueous solution. The prepared MnFe2O4 catalyst was characterized by XRD and BET. The effects of MnFe2O4 dosage, PMS dosage, initial pH of the solution, quencher, and co-existing ions on the degradation of bisphenol A were investigated. The reusability of the MnFe2O4 catalyst was evaluated through cycling experiments. The results showed that the best dosages of MnFe2O4 and PMS were 0.3 g/L and 0.3 mmol/L, respectively. When the initial pH was 11.0, the degradation rate of bisphenol A was 99.3% in 60 min. When putting some quenchers into the MnFe2O4/PMS catalytic system, all of them showed depression effects on degradation of bisphenol A, and the 1O2 was the main active species. The co-existing ions such as Cl-, HCO3-, and HPO42- in solution affected the degradation of bisphenol A. The TOC removal rate of bisphenol A within 60 min was 34.9%, the rupture and opening of benzene ring are the main reaction pathways. After the MnFe2O4 catalyst was recycled three times, the degradation rate of bisphenol A remained at about 90.0%.

Key words: bisphenol A, MnFe2O4, salt-assisted solution combustion synthesis, sulfate radical, catalysis, degradation, preparation

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